ul,
li {
  list-style: none;
  margin: 0;
  padding: 0;
}
li {
  float: left;
}
.item {
  width: 102px;
  height: 107px;
  position: relative;
}
.item .img {
  text-align: center;
  position: relative;
  width: 102px;
  height: 107px;
  max-width: 100%;
}
.item img {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  max-width: 100%;
  max-height: 100%;
}
.item .button {
  position: absolute;
  top: 0;
  left: 0;
  background: rgba(0, 0, 0, 0.7);
  text-align: center;
  display: none;
  width: 100%;
  height: 100%;
  color: white;
}
.item .button span {
  display: block;
  line-height: 36px;
  cursor: pointer;
}
.item .button span:hover {
  background: rgba(255, 0, 0, 0.7);
}
.item .img:hover .button {
  display: block;
}
/* 页脚 */
.footer {
  margin-top: 150px;
}
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-thumb {
  background: #49b1f5;
}

::-webkit-scrollbar-track {
  background-color: transparent;
}
